Study on relations between SO2 injury sensitivity and grape peel structure, physiology and biochemistry
G. Haiyan , Z. Huayun and W. Shanguang
Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. Abstract S09-P-159. pp. 261.
2002
บทคัดย่อ
Experiments were performed using eight grape cultivars to study SO2 injury to table grapes in normal and low temperature storag, and the relation ship between SO2 fumigation, exposure time, storage temperature and injury extent of table grapes. The relationship between the peel structure, physiology and biochemistry and sensitivity to SO2 injury was also researched. The result showed that the sensitivity to SO was different in the grape cultivars and not dependent upon storage temperature. The sequence of sensitivity was: ‘Ribier’ > ‘Hongbaoshi’> ‘Red Gloe’> ‘Niunai’> ‘Kyoho’> ‘Muscate Hamburg’> ‘Longyan’> ‘Black Autumn’. The eight grape cultivars can be classified as, very sensitive to SO2 (“’Ribier” , “Hongbaoshi” , “Red Globe”), inferior sensitive to SO2 (“Nunai”) , inferior tolerant to SO2 (“Kyoho” , “Muscat Hamburg”), and most tolerant to SO2 (“Longyan” , “Black Autumn”). The sulfite residues of different parts of grapes varied greatly after fumigated with SO2 from high to low in pedicel, stem, skin, brush and flesh. Data showed that stem, pedicel and skin were the two main pathways of SO2 entrance into grape fruit. The large ration of the sulfite residues in skin and in pedicel of the sensitive grapes to SO2 indicated that the grapes sensitivity to SO2 had a close relative grapes to SO2 indicated that the grapes sensitivity to SO had a colse relation to their skin absorbing capacity of SO2. The skin bleaching index was strongly correlation with the temperature, fumigation concentration and time. The sensitive grapes (‘Ribier’ , ‘Hongbao shi’ , ‘Red Globe’ , ‘Niunai’), the fumigation concentration and time had significant effects on the bleaching index, but the fumigation time had insignificant effect on the SO2 tolerant graped (‘Longyan’ , ‘Black Autumn’). The effect of fumigation time on bleaching index had a negative correlation with the grape.